We are local gas engineers with over 15 years of experience in heating and plumbing services. For 24/7 emergency service call 1-800-331-1956. Getting an energy-efficient boiler is a great start to saving on heating, but what's the purpose of heating your home if the heat is escaping? After compiling and organizing the data, we report it back to you. Proudly serving toronto, mississauga, oakville, thornhill,.